dayjs locale config is ignored and it uses automaticly browser locale

**Describe the bug**
dayjs locale config is ignored and it uses automaticly browser locale

**Expected behavior**
```js
// config.js
import 'dayjs/locale/fr';
dayjs.locale('fr')
```
in main react page
```js
import './config'
```
and in my component
```js
dayjs(fullStartDate).to(fullEndDate, true);
```
**the language changes to french but when i refrech it comeback english (i think its because the browser locale)**

but when i do this it works as french always
```js
dayjs(fullStartDate).locale('fr').to(fullEndDate, true);
```
how can i config the language clearly without using the locale for each time
**Information**
- Day.js Version 1.10.7
- OS: MacOS monterey
- Browser Chrome last version
- Time zone: (UTC+1)

Start with the config.js import and the main React page described in the report, then reproduce the locale behavior in the component after a browser refresh. Check how the reported Day.js version applies the global locale versus the per-call locale. Done means the French setting persists without adding locale('fr') to each usage.

Written by the indexing model from the issue text.